Animals get blamed countless of times for attacks that are caused by humans either disobeing the rules placed in the zoo or terrorising them.
there has been many cases where the carnivores ignore the people, its only when they start jumping and moving about that they become curious. in one case a man climbed into a tiger enclosure, the tiger ingored him, so he went and started kicking and throwing thigs at the tiger. The tiger got blamed for the attack and got euthanazed.
there have been many cases this this involving lions, wild dogs and wolves